Adjustable support for motion-picture mechanism



March 10. 1925- 1,529,591

S. HUBER ADJUSTABLE SUPPORT FOR MOTION PICTURE MECHANISM Filed March 3, 1924 r M -rn/ -v Sierl Huber \NVENTOF wvmzssfS O Ev Patented Mar. 10, 1925.

UNITED STATES P A T M. mime F Be 'P- 1T .N 2leNA=.

ADJUSTABLE SUPPORT FOR, MOTION-PICTURE MECHANISM.

Application filed March 3, 1924. Serial No. 696.614.

T 0 all whom it may concern:

Be it known that I, S'rEnuHUBEn. a citi' zen of the United States. residing at Hartford City, in the'county of Blackford and 'State of Indiana, have invented new and useful Improvements inqAdjustahle Supports fo1--l\1otion-Picture Mechanism. of

which the following is a specification.

This invention relates to machines for the projection (of motion pictures and has for its object the provision of a novel adjustable hearing in the intermittent drive mechanisnr-for-the purpose'of regulating and adjusting the parts to insure proper actuation of thestar wheel which acts to drive the film step by step.

It is well known that in the ordinary constructionit is a diflicult matter to make the proper adjustment of the .star Wheel with respect to the driving disk and pin therefor, two bushings being ordinarily provided,

which bushings must be individually advjusted. Furthermore the parts are so arranged that they are rather inaccessible which makes it a diflicult matter for the operator to make adjustments especially in a short time.

It is with thesefacts in view that I have designed the )resent support or mounting which is readily capable of being moved or shifted as may be found necessary to insure proper operation of the intermittent drive mechanism.

Another object is the provision of a device of this character equipped with means for taking up the end thrust thereby greatly improving the running of the machine and the quality of the projection.

An additional object is the provision of a mounting of this character which will be simple and inexpensive in manufacture. easy to install. and adjust, positive in action. eflicient and durable in service and a general improvement in the art.

With the above and other objects and ad vantages in view the invention consists in the details of construction to he hereinafter more fully described and claimed and illustrated in the accompanying drawings. in which:

Figure 1 is a fragmentary side elevation of a motion picture machine showing an end view of my device.

Figure 2 is an elevation of the other end of the device,

\ Figure 3 is a section on the line 33 of Figure 2,

Figure 4 is a detail view of the stationary supporting disk,

Figure 5 is a detail view of the actuating disk and pin.

Figure 6 is a view somewhat similar to Figure 1 showing the adjustable member arranged in a different position with the film threaded through the machine in a different manner.

Referring more particularly to the drawings, the letter A designates a portion of a motion picture machine of the conventional type in which there is a film driving spool B carried by a shaft C equipped with a star wheel D actuated by a pin E on a rotary disk F. It is alsowell known that the star wheel is equipped with four arms having slots Gr within which the pin Eengages as the disk F is rotated by Whatever means is provided. The disk has a flange H interrupted at a point I for the accommodation of the arms of the star wheel during their travel.

.In carrying out my invention I provide a stationary supporting plate 10 which is of circular form and which fits within an opening 11 in the frame of the machine A and secured by screws or the like 12 passing through holes 13 in the plate. This plate carries a suitable bearing 14 for the shaft which carries the disk F.

At an eccentric point, the plate 10 is formed with a circular opening 15 within which is rotatably engaged a journal or trunnion 16 formed on one arm of a U- shaped bracket 17. The trunnion 10 is provided with an eccentric circular hole 18 and the other arm of the bracket is provided with a, hole 19 aligning therewith. Engaged through the holes 18 and 19 are bushings 20 and 21 through which the shaft C extends. and these bushings bear against the opposite ends of the spool B. Nothing is necessary for holding the bushing 20. but I have shown the bushing .21 as adjustable and normally locked by a set screw 22.

Mounted against the inner side of the circular plate 10 is an L-shaped clip 23 which overlies a flange 24 on the bracket 17 at the journal or trunnion 16, and this clip is held by a screw 24.

To effect adjustment. it is merely necessary to loosen the screw 25 so that pressure the rotation of the disk F. This exact position is an important matter as it determines the smoothness or operation of the machine, it being obvious that when the adjustment is correct the shock and jar will be greatly reduced and better action and consequently better projection insured. When a proper position is reached, the screw 25 should be tightened to hold the parts stationary.

When in course of time end play develops, it is merely necessary to loosen the screw 22 and push in the bushing 21 until it engages the end of the spool and in this way the end thrust is taken up and chattering prevented.

Figure 1 shows the usual tension roller J urged against the film and spool by means of asuitable spring K mounted on a support L. These details are illustrated simply for the sake of illustration and form no part of the present invention. The film M is in this instance threaded down about the spool and over the roller J. It will also be observed by reference to this figure that the adjustable member 17 is in an upwardly inclined position so as not to interfere with any necessary repairs, adjustments or the like.

Figure 6 shows the film M threaded differently, it being brought under a guide roller N, over the s 001 and against a guide roller 0. In this instance the member 17 is shown as arranged in a downwardly in clined direction so as not to extend across or at the side of the travel of the film.

While I have shown and described the preferred embodiment of my invention it is of course to be understood that I reserve the right to make such changesin the form, construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention I claim:

1. In a motion picture machine including a film drivingspool, a shaft carrying the spool, a star wheel on the shaft, a rotary drive disk, and an eccentric pin on the disk engageable with the star wheel, an adjustable bearing for the shaft whereby the position of the shaft with respect to the driving disk may be varied, said bearing comprising a U-shaped bracket having one arm formed with a trunnion rotatably engaged through a hole in the side of the machine, said trunnion and the other arm of the bracket being formed with aligning holes eccentric with respect to the trunnion and bearing bushings in said last named holes through which the shaft is journaled, and an angular screw mounted clip engaging the bracket for holding the same stationary.

2. In a motion picture machine including a film driving spool, a shaft carrying the spool, a star wheel on the shaft, a rotary drive disk, and an eccentric pin on the disk engageable with the star wheel, an adjustable bearing for the shaft whereby the position of the shaft with respect to the driving disk may be varied, said bearing comprising a U-shaped bracket having one arm formed with a trunnion rotatably engaged through a hole in the side of the machine, said trunnion and the other arm of the bracket being formed with aligning holes eccentric with'respect to the trunnion and bearing bushings in said last named holes through which the shaft is journaled, the bushing in the second named arm of the bracket being longitudinally adjustable to take up end wear.

In testimony whereof I affix my signature.

STERL HUBER. 

